Tin-scrap rending and shredding apparatus.



M. LEITGH.

TIN SCRAP RENDING AND SHREDDING APPARATUS. API 'LIGATION FILED NOV 30, 1906. RENEWED JAN. 10, 190B.

PATENTED MAR. 31, 1908.

3 HEBREW-SHEET 1.

. M. LEITGH; A TIN SCRAP RENDING AND SHREDDING APPARATUS.

APPLICATION TILED NOV. 30 1906. RENEWED JAN. 10, 1908.

3 SHEETS-SHEET 2.

I L; f

Witnesses wvwvtoz 1 a t 0' I PATENTED MAR. 31, 1908.

PATENTED MAR. 31, 1908.

. x M. LEITCH.

TIN SCRAP RBNDINGAND SHREDDING APPARATUS.

APPLICATION FILED NOV. 30, 1906. RENEWED JAN. 10, 1908.

3 SHEETS-SHEET 3.

I Swdawto-zj tjw (142021031 wi/tmwoe-o f lie close to one sideof the disks A, while the teeth on the disks H lie close to the other side of the disks A. The disks K are spaced twice as far apart as the disks upon the other groups, and are in line with every other one of the disks D. The disks are all made of thin metal, the disks A, A, D and H being slightly morethan inch, while the disks K slightly less than inch and should be made of strong steel.

Thescrap whioh is to be torn asunder and cut up is fed between the disks A A. The teeth upon these disks A A engage the scrap and cause it to pass down between them flattening or crushin it together somewhat. When the scrap reac es the gang of'disks D it passes between these disks and the disks A.

The teeth on the disks Denter the spaces be-' disks A, the teeth ofwhich are also moving at a faster rate than the teeth upon the disks A, whereupon the scrap is subjected to a second tearing or rending action, which will open any seams which may haveescaped be fore. From the disks A the scrap 1s next passed onto the disks K. These teeth are rotated at a very rapid rate so that a sawing action takes place. The scrap before it reaches them is impaled upon the teeth of the disks A, and is therefore held so as to be subjected to the'action of these saws which cut it into shreds. It will be seen from the foregoing that the disks A constitute a slowly advancing abutment for the action of the rending or tearing of disks D and II and also I constitute an abutmentfor the sawing disksK.

In order that no scra may adhere to the sawing disks K, I provi e a stripper Q which consists of a series of members situated between the disks K and so shaped as to leave the saw teeth exposed for sawing action, but to come "out to the tips of the saw teeth to the point R, so that any material which may adhere to the points will be forced off. The moving abutment furnished by the disks A is an important feature since it continually resents to the gangs D and II and the saws a new surface. If a stationary abutment were used scrap might become lodged upon it and accumulate so as to result in an obstruction. With the moving abutment, when a point passes from the saws K. upward any scrap which has not otherwise been dislodged drops olf so that upon the next revolution of the disks A there will be no scrap adhering thereto.

'thepit.

In Fig. 4 I have shown a desoldering furnace S such as is shown in my Patent No. 800,222, granted September 26, 1905. This furnace discharges. the desoldered scrap into an inclosed chamber T containing the shredding apparatus. The scra reaches the shredding apparatus while still hot, and the seams are torn apart while the solder is melted. A deoxidized-atmosphere is maintained around the apparatus'b -reason of the gases escaping through the ischarge opening of the furnace. A suitable elevator U' is provided forremoving the shredded scrap from is sufficiently cooled so that danger of oxidation is passed. Scrap which has been thus treated has on it a minimum amount of solder. Its seams are'well opened so that By the time it reaches the surface it they can be thoroughly detinned. It is fur- -ther cut up andmade into a form such that it can be readily compressed into bundles which will hold their shape' All of which results are very valuable.

- The method described and claimed in this application is claimed in a copending application filed as a division of this application.

Having thus described my invention, what I claim is:

1. In an apparatus for treating tin cans and the like, the combination of a gang of rotating disks having teeth, an abutment also having teeth coacting with the teeth upon the rotating disks, and a means for causing the teeth upon said disks to move slowlyrelatively to the teeth upon said abutment so as to tear or rendapart tin cans which may be impaled upon them.

2. In an apparatus for treating tin c:-.ns and the like, the combination of a gang of retating disks having teeth, an abutment also having teeth coacting with the teeth upon the rotating disks, and a means for causing the teeth upon said disks to move slowly relatively to .the teeth upon said abutment so as to tear or rend apart tin cans which may be impaled upon them, the teeth upon said rotating disks being pointed in a forward direction while the teeth upon the abutment are pointed in a backward direction.

3. In an apparatus for treating tin cans and the like, the combination of a gang of retating disks having teeth, an abutment also having teeth coacting with the teeth upon therotating disks, and a means for causing the teeth upon said disks to move slowly relatively to the teeth upon said abutment so as to tear or rend apart tin'sc'rap which may be subjected to them said abutment being itself in the form of a revolving gang of toothed disks.

4. In an apparatus for treating tin cans and the like, the combination of a gang of rotatable disks having teeth, an abutment also consisting of a rotatable gang of disks having teeth coacting with the teeth upon and the like, t 1e combination of two gangs of disks geared together so as to rotate in 0 posite directions, the peripheries of said dis as being close to one another, but not overlap ping and a third gang of disks having teeth moving at a faster rate than the peripheries of said first mentioned disks and penetrating the spaces between the disks of one of said other gangs.

6. In an apparatus for treating tincans and the like, the combination of two gangs of disks geared togetherso as to rotate in opposite'directions, the peripheries of said disks being close to one another, but not overlap ping, and a third gang of disks having teeth moving at a faster rate than the peripheries of said first mentioned disks and penetrating the space between the one of said first 1116311. tioned gangs of disks Whose periphery is moving in the same direction as the opposing portion of the periphery of said. third gang of disks.

7. In an apparatus for treating tin cans and the like, the combination of a gang of rotating disks having teeth, an abutment also having teeth coacting With the teeth upon the rotating disks, and a means for causing said disks to rotate slowly relatively to such second set of teeth so asato tear or rend apart tin scrap which may be subjected to them, in combination with a third gang of. disks penetrating the spaces between one pf said other gangs of disks and rotating at a relatively high rate so as to produce a sawing action.

8. lnan apparatus for treating tin cans and the like, the combination of a rotating disk having teeth pointing in'the opposite d rection to ts direction of rotat1on,'a second gang of disks penetrating the spaces between the first gang of disks and acting-to impale scrap upon the teeth of said first gang of disks and a third set of disks also penetrating the spaces between the said first set of disks, said-third set of disks being provided with teeth and rotating at a high rate relatively to said first set of disks so as to produce a sawing action upon scrap impaled upon the teeth of said fastest of disks.

9. In an apparatus for treating tin cans and the hke, the combination of a gang of rapidly rotating toothed disks, an abutment consisting of a gang of toothed disks having a relatively slow movement of rotation inthe opposite direction, and means for rotating said disks. I

10. In. an apparatus for treating tin cans and the like, the combination of a gang of rapidly rotating toothed disks, an abutment consisting of a gang of toothed disks having a relatively slow movement of rotation in the opposite direction, means for rotating said disks, and strippers for said rapidly rotating disks located-between said disks and gradually approaching the points of the teeth thereon.

MEREDITH LEITCH.

Witnesses:

H. B. BROWNELL.

L, VnnELANn. 

